Data corruption is the unintended modification of a file or the loss of info that often occurs during reading or writing. The reason may be hardware or software fail, and because of this, a file could become partially or fully corrupted, so it'll no longer function properly since its bits shall be scrambled or lacking. An image file, for instance, will no longer present an authentic image, but a random combination of colors, an archive will be impossible to unpack for the reason that its content will be unreadable, and so on. In case such an issue appears and it is not noticed by the system or by an admin, the data will become corrupted silently and if this happens on a disk drive which is a part of a RAID array where the data is synced between different drives, the corrupted file shall be copied on all other drives and the damage will be long term. Numerous widely used file systems either don't offer real-time checks or don't have high quality ones that will detect a problem before the damage is done, so silent data corruption is a very common issue on web hosting servers where large amounts of data are stored.
No Data Corruption & Data Integrity in Hosting
We have tackled the matter of silent data corruption on all of our hosting servers by using the hi-tech Z file system, or ZFS. The latter is better than other file systems because it is the only one out there that checks all of the files right away by using a checksum - a digital identifier that's unique for each file. When you upload content to your account, it will be stored on several SSD drives and constantly synced between them for redundancy. ZFS constantly examines the checksum of all files and in the event that any file is detected as damaged, it's replaced right away with a good copy from another disk. As this happens in real time, there is no risk that a bad file may remain or may be duplicated on the remaining SSDs. ZFS needs a lot of physical memory in order to perform the real-time checks and the benefit of our cloud hosting platform is that we take advantage of multiple very powerful servers working together. In case you host your websites with us, your info will be intact no matter what.
No Data Corruption & Data Integrity in Semi-dedicated Servers
Your semi-dedicated server account will be shielded from silent data corruption because all our storage servers work with the effective ZFS file system. What makes the aforementioned unique is that it uses checksums, or digital identifiers, in order to ensure the integrity of every single file. When you upload content to your account, it'll be kept on a couple of redundant drives employed in a RAID i.e. the files shall be the same across all disk drives. All the copies of a particular file will feature the same checksum on all hard drives and ZFS will compare the checksums of the copies quickly, so if it identifies a mismatch, that will indicate that one of the copies is damaged, it will swap that file with a good copy from one of the other disks. Even if there is an unexpected power loss, the data on the servers will not be corrupted and there will not be any need for a time-consuming system check that other file systems perform following some failure, prolonging the time needed for the server to go back online. ZFS is the only file system that can really protect your content from silent data corruption.